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3 years ago

15

16d - (4 - 5d) = -67 Please help me find d

2 answers:

san4es73 [151]3 years ago

6 0

The negative at the other side of the parenthesis must be distributed inside the parenthesis changing the equation to 16d -4 + 5d = -67.

now add any like terms. in this equation that would be 16d + 5d = 21d

now the equation vhanges too 21d - 4 = -67

now you isolate the variable. so add 4 to both sides of the equal sign
21d - 4 (+4) = -67 (+4)

21d = - 63

divide by 21 on both side of equal sign 21d(/21) = -63 (/21)

d= -3

madreJ [45]3 years ago

5 0

$16d-(4-5d)=-67\\\\16d-4-(-5d)=-67\\\\16d-4+5d=-67\\\\21d-4=-67\ \ \ \ /+4\\\\21d-4+4=-67+4\\\\21d=-63\ \ \ \ /:21\\\\21d:21=-63:21\\\\d=-3$

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